From ffcd52ef0907f56181a28f4ae5ab6f0b39e3cf58 Mon Sep 17 00:00:00 2001 From: "J. German Rivera" Date: Sat, 17 Oct 2015 11:18:14 -0500 Subject: staging: fsl-mc: fsl_mc_io object refactoring Each fsl_mc_io object is associated with an fsl_mc_device object of type "dpmcp" representing the MC portal associated with the fsl_mc_io object. Before, we were representing this association with an fsl_mc_resource pointer. To enhance code clarity, it is more straight forward to use an fsl_mc_device pointer instead. So, this change replaces the 'resource' field in the fsl_mc_io object with 'dpmcp_dev'. Also, it changes parameter 'resource' of fsl_create_mc_io() to be an fsl_mc_device pointer instead. Signed-off-by: J. German Rivera Signed-off-by: Greg Kroah-Hartman --- drivers/staging/fsl-mc/bus/mc-allocator.c | 34 ++++++++++++++++++------------- drivers/staging/fsl-mc/bus/mc-sys.c | 16 +++++++++++---- drivers/staging/fsl-mc/include/mc-sys.h | 8 +++----- 3 files changed, 35 insertions(+), 23 deletions(-) (limited to 'drivers/staging') diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c index a4aa85958733..c3222c6c7e1f 100644 --- a/drivers/staging/fsl-mc/bus/mc-allocator.c +++ b/drivers/staging/fsl-mc/bus/mc-allocator.c @@ -320,7 +320,7 @@ int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev, error = fsl_create_mc_io(&mc_bus_dev->dev, mc_portal_phys_addr, - mc_portal_size, resource, + mc_portal_size, dpmcp_dev, mc_io_flags, &mc_io); if (error < 0) goto error_cleanup_resource; @@ -342,12 +342,22 @@ EXPORT_SYMBOL_GPL(fsl_mc_portal_allocate); */ void fsl_mc_portal_free(struct fsl_mc_io *mc_io) { + struct fsl_mc_device *dpmcp_dev; struct fsl_mc_resource *resource; - resource = mc_io->resource; - if (WARN_ON(resource->type != FSL_MC_POOL_DPMCP)) + /* + * Every mc_io obtained by calling fsl_mc_portal_allocate() is supposed + * to have a DPMCP object associated with. + */ + dpmcp_dev = mc_io->dpmcp_dev; + if (WARN_ON(!dpmcp_dev)) + return; + + resource = dpmcp_dev->resource; + if (WARN_ON(!resource || resource->type != FSL_MC_POOL_DPMCP)) return; - if (WARN_ON(!resource->data)) + + if (WARN_ON(resource->data != dpmcp_dev)) return; fsl_destroy_mc_io(mc_io); @@ -364,30 +374,26 @@ int fsl_mc_portal_reset(struct fsl_mc_io *mc_io) { int error; u16 token; - struct fsl_mc_resource *resource = mc_io->resource; - struct fsl_mc_device *mc_dev = resource->data; + struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev; - if (WARN_ON(resource->type != FSL_MC_POOL_DPMCP)) - return -EINVAL; - - if (WARN_ON(!mc_dev)) + if (WARN_ON(!dpmcp_dev)) return -EINVAL; - error = dpmcp_open(mc_io, 0, mc_dev->obj_desc.id, &token); + error = dpmcp_open(mc_io, 0, dpmcp_dev->obj_desc.id, &token); if (error < 0) { - dev_err(&mc_dev->dev, "dpmcp_open() failed: %d\n", error); + dev_err(&dpmcp_dev->dev, "dpmcp_open() failed: %d\n", error); return error; } error = dpmcp_reset(mc_io, 0, token); if (error < 0) { - dev_err(&mc_dev->dev, "dpmcp_reset() failed: %d\n", error); + dev_err(&dpmcp_dev->dev, "dpmcp_reset() failed: %d\n", error); return error; } error = dpmcp_close(mc_io, 0, token); if (error < 0) { - dev_err(&mc_dev->dev, "dpmcp_close() failed: %d\n", error); + dev_err(&dpmcp_dev->dev, "dpmcp_close() failed: %d\n", error); return error; } diff --git a/drivers/staging/fsl-mc/bus/mc-sys.c b/drivers/staging/fsl-mc/bus/mc-sys.c index b58b53fe165c..e53acfaa2304 100644 --- a/drivers/staging/fsl-mc/bus/mc-sys.c +++ b/drivers/staging/fsl-mc/bus/mc-sys.c @@ -34,10 +34,12 @@ #include "../include/mc-sys.h" #include "../include/mc-cmd.h" +#include "../include/mc.h" #include #include #include #include +#include "dpmcp.h" /** * Timeout in jiffies to wait for the completion of an MC command @@ -60,8 +62,8 @@ * @dev: device to be associated with the MC I/O object * @mc_portal_phys_addr: physical address of the MC portal to use * @mc_portal_size: size in bytes of the MC portal - * @resource: Pointer to MC bus object allocator resource associated - * with this MC I/O object or NULL if none. + * @dpmcp-dev: Pointer to the DPMCP object associated with this MC I/O + * object or NULL if none. * @flags: flags for the new MC I/O object * @new_mc_io: Area to return pointer to newly created MC I/O object * @@ -70,7 +72,7 @@ int __must_check fsl_create_mc_io(struct device *dev, phys_addr_t mc_portal_phys_addr, u32 mc_portal_size, - struct fsl_mc_resource *resource, + struct fsl_mc_device *dpmcp_dev, u32 flags, struct fsl_mc_io **new_mc_io) { struct fsl_mc_io *mc_io; @@ -85,7 +87,8 @@ int __must_check fsl_create_mc_io(struct device *dev, mc_io->flags = flags; mc_io->portal_phys_addr = mc_portal_phys_addr; mc_io->portal_size = mc_portal_size; - mc_io->resource = resource; + mc_io->dpmcp_dev = dpmcp_dev; + dpmcp_dev->mc_io = mc_io; res = devm_request_mem_region(dev, mc_portal_phys_addr, mc_portal_size, @@ -126,6 +129,11 @@ void fsl_destroy_mc_io(struct fsl_mc_io *mc_io) mc_io->portal_size); mc_io->portal_virt_addr = NULL; + if (mc_io->dpmcp_dev) { + WARN_ON(mc_io->dpmcp_dev->mc_io != mc_io); + mc_io->dpmcp_dev->mc_io = NULL; + } + devm_kfree(mc_io->dev, mc_io); } EXPORT_SYMBOL_GPL(fsl_destroy_mc_io); diff --git a/drivers/staging/fsl-mc/include/mc-sys.h b/drivers/staging/fsl-mc/include/mc-sys.h index 939b7d39b365..bfbecafe75d9 100644 --- a/drivers/staging/fsl-mc/include/mc-sys.h +++ b/drivers/staging/fsl-mc/include/mc-sys.h @@ -50,9 +50,7 @@ struct mc_command; * @portal_size: MC command portal size in bytes * @portal_phys_addr: MC command portal physical address * @portal_virt_addr: MC command portal virtual address - * @resource: generic resource associated with the MC portal if - * the MC portal came from a resource pool, or NULL if the MC portal - * is permanently bound to a device (e.g., a DPRC) + * @dpmcp_dev: pointer to the DPMCP device associated with the MC portal. */ struct fsl_mc_io { struct device *dev; @@ -60,13 +58,13 @@ struct fsl_mc_io { u32 portal_size; phys_addr_t portal_phys_addr; void __iomem *portal_virt_addr; - struct fsl_mc_resource *resource; + struct fsl_mc_device *dpmcp_dev; }; int __must_check fsl_create_mc_io(struct device *dev, phys_addr_t mc_portal_phys_addr, u32 mc_portal_size, - struct fsl_mc_resource *resource, + struct fsl_mc_device *dpmcp_dev, u32 flags, struct fsl_mc_io **new_mc_io); void fsl_destroy_mc_io(struct fsl_mc_io *mc_io); -- cgit v1.2.3